ESTIMATION OF THE DISTRIBUTION OF SURFACE SITES AND CONTACT ANGLES ON COAL PARTICLES FROM FILM FLOTATION DATA

被引：43

作者：

FUERSTENAU, DW

DIAO, J

HANSON, JS

机构：

[1] Department of Materials Science and Mineral Engineering, University of California, Berkeley

来源：

ENERGY & FUELS | 1990年 / 4卷 / 01期

关键词：

D O I：

10.1021/ef00019a007

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Because of their heterogeneity, coal particles may vary widely in composition and, consequently, each particle may have its own unique set of surface properties. The distribution of surface wettabilities of coal particles can be determined by a film flotation technique, using a series of aqueous methanol solutions to vary the surface tension of the liquid. This paper shows how such measurements of the critical wetting surface tension can be used to quantify the contact angle of the particles and the distribution of hydrophobic sites on the surface of the particles. The mean contact angles of particles calculated from film flotation for sulfur, graphite, and a number of different coals are in reasonable agreement with the values reported in the literature for bulk material. © 1990, American Chemical Society. All rights reserved.

引用

页码：34 / 37

页数：4

共 22 条

[1] ATTIA YA, 1988, PROCESS TECHNOLOGY P, V7, P429
[2] Wettability of porous surfaces.
Cassie, ABD
Baxter, S
[J]. TRANSACTIONS OF THE FARADAY SOCIETY, 1944, 40 : 0546 - 0550
[3] CONTACT ANGLES
CASSIE, ABD
[J]. DISCUSSIONS OF THE FARADAY SOCIETY, 1948, 3 : 11 - 16
[4] Diao J., 1987, THESIS U CALIFORNIA
[5] CHARACTERIZATION OF THE LYOPHOBICITY OF PARTICLES BY FILM FLOTATION
FUERSTENAU, DW
WILLIAMS, MC
[J]. COLLOIDS AND SURFACES, 1987, 22 (01): : 87 - 91
[6] FUERSTENAU DW, 1986, MAR AIME ANN M NEW O
[7] FUERSTENAU DW, INTERFACIAL PHENOMEN
[8] Good R. J., 1979, SURFACE COLLOID SCI, V11, P1, DOI DOI 10.1007/978-1-4615-7969-4_1
[9] Good R.J., 1972, J COLLOID INTERF SCI, V38, P341
[10] GOULD R, 1964, ADV CHEM SER, V43, P1

← 1 2 3 →